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    Damper on Nema for corexy ?

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    • antlestxpundefined
      antlestxp
      last edited by

      any reason you want to use dampers?

      1 Reply Last reply Reply Quote 0
      • Dougal1957undefined
        Dougal1957
        last edited by

        IMHO Dampers are a bad idea on an axis that has a toothed pulley on the motor they can cause the axis of that motor to tilt under the tension of the belts!

        Doug

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        • Nightreaverundefined
          Nightreaver
          last edited by Nightreaver

          I have a corexy and dual Z stepper, and have damper on all of them, even on extruder.
          0_1560363245670_9cb591f2-bc85-401c-8733-cedcc7d04773-image.png
          And I have no issues from that.
          The loudest thing on my printer is the stock part-cooling fan 😄

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          • zaptaundefined
            zapta
            last edited by zapta

            [adding to an old thread]

            I struggled with movement noise for some time and the problem disappeared when I added dampers to the X/Y steppers of my HEVO. My printer now sounds great. Apparently the noise was caused by motor vibrations that were transmitted to the 3030 frame and at time caused it to resonate.

            To verify that X/Y dampers will help your CoreXY, disconnect the belts, and try to reproduce the noise with gcode like the one below (adjust the speed range as needed):

            G91   ; relative
            ; Move motor at different speeds.
            ; Use X for motor 1, Y for motor 2
            ; These moves do not require homing.
            G1 X300 H2 F2400 
            G1 X300 H2 F2600  
            G1 X300 H2 F2800 
            G1 X300 H2 F3000 
            G1 X300 H2 F3200  
            ; ...
            

            Once you are able to reproduced the noise, remove the motor from the frame, hold it in suspended in your hand and run the script again. If the noise disappeared, your printer will benefit from dampers. I my case I had to change the design of the motors mounts to compensate for the additional 6mm of clearance the dampers add.

            https://www.amazon.com/gp/product/B07GWN6V89

            IMG-1851.JPG

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            • whosrdaddyundefined
              whosrdaddy
              last edited by

              Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

              A Former User? zaptaundefined Phaedruxundefined 3 Replies Last reply Reply Quote 0
              • A Former User?
                A Former User @whosrdaddy
                last edited by

                @whosrdaddy said in Damper on Nema for corexy ?:

                Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

                Just wondering, would any thermal insulation provided by the dampener transfer less heat to printed parts and as such have a positive effect on deflection in that regard? Maybe insignificant?

                whosrdaddyundefined 1 Reply Last reply Reply Quote 0
                • whosrdaddyundefined
                  whosrdaddy @A Former User
                  last edited by whosrdaddy

                  @bearer said in Damper on Nema for corexy ?:

                  @whosrdaddy said in Damper on Nema for corexy ?:

                  Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

                  Just wondering, would any thermal insulation provided by the dampener transfer less heat to printed parts and as such have a positive effect on deflection in that regard? Maybe insignificant?

                  Very simple, use metal parts to mount your motor 😉
                  I use these from Motedis, here is their informative Video.
                  There is also a newer version which allows for corner mounting.

                  A Former User? 1 Reply Last reply Reply Quote 0
                  • A Former User?
                    A Former User @whosrdaddy
                    last edited by

                    @whosrdaddy said in Damper on Nema for corexy ?:

                    Very simple, use metal parts to mount your motor

                    Hehe, thats the plan. But I was just curious if the dampener thing was all back and white with printed parts.

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                    • zaptaundefined
                      zapta @whosrdaddy
                      last edited by

                      @whosrdaddy said in Damper on Nema for corexy ?:

                      Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

                      I didn't observe any of that on my printer. The dampers I use are very stiff and I could tighten the belts to my liking. I was actually surprised how stiff they are, must be a material that absorbs high frequencies but not static force.

                      I got these no names ones from amazon
                      https://www.amazon.com/gp/product/B07GWN6V89 but Moon has here some information on their dampers https://www.moonsindustries.com/series/dampers-a020202

                      My printer is definitely a better printer now. YMMV.

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                      • Phaedruxundefined
                        Phaedrux Moderator @whosrdaddy
                        last edited by

                        @whosrdaddy said in Damper on Nema for corexy ?:

                        Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

                        They're quite a bit stiffer than you'd think. Considering a lot of us are using printed parts....

                        Z-Bot CoreXY Build | Thingiverse Profile

                        Luke'sLaboratoryundefined 1 Reply Last reply Reply Quote 0
                        • Luke'sLaboratoryundefined
                          Luke'sLaboratory @Phaedrux
                          last edited by

                          @Phaedrux said in Damper on Nema for corexy ?:

                          @whosrdaddy said in Damper on Nema for corexy ?:

                          Don't use dampers, they may lower the noise but they do weaken the rigidness of your motion system (and thus introduce positioning errors)!

                          They're quite a bit stiffer than you'd think. Considering a lot of us are using printed parts....

                          Yeah I wouldn't expect those kinds of dampers would be any less rigid than printed ones!

                          Luke
                          http://lukeslab.online

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